Open back planar headphones Open flat diaphragm design Large Planar Magnetic driver (95mm x 86mm) High fidelity sound Interchangeable 3.5mm/4.4mm plugs The Fiio FT1 Pro is an advanced open flat diaphragm headphone equipped with a specially developed 95x86mm flat diaphragm unit. Featuring a 1μm special film diaphragm, double sapphire aluminium coating and a balanced open acoustic design, the FT1 Pro offers a wide frequency response from 7Hz to 40kHz. With its lightweight and breathable construction, it is designed for comfort and exceptional sound quality. Self-developed planar driver 95x86 mm driver for a wide sound stage and precise sound reproduction. 1 μm special film diaphragm The ultra-thin diaphragm enables fast response and detailed high frequency reproduction. Double sapphire aluminium coating Improves sound clarity and frequency response with a unique sound. Uniform magnetic field design Ensures even magnetic distribution and reduces distortion for refined sound quality. 28nm chip-level process technology The semiconductor process improves the durability and performance of the diaphragms. 3-axis adaptive wearing design Adapts comfortably to different head shapes thanks to the adjustable headband. Breathable ear pads Designed for long listening sessions with heat dissipation and comfort. Interchangeable audio plug Includes both 3.5 mm and 4.4 mm connectors for flexible use The Fiio FT1 Pro is designed for audiophiles who want the ultimate open-back flat diaphragm experience. With innovative technologies such as 28nm chip-level diaphragm manufacturing, uniform magnetic field design and sapphire aluminium coating, the FT1 Pro delivers a dynamic and immersive listening experience. The adaptable design ensures comfort during long sessions and makes it a versatile choice for high-fidelity sound on the go.